# [SMTPD_PID_FILE_UPDATE](https://apps.juniper.net/syslog-explorer/?msg=SMTPD_PID_FILE_UPDATE)

## SYSLOG Details
- **Message**: Unable to update process PID file: <variable>error-message</variable>
- **Help**: SMTP client daemon could not update PID file
- **Description**: The smtp client process (smtpd) attempted to update the file that records its process ID (PID), which serves to prevent multiple instances of smtpd from running simultaneously. It could not update the file and exited after logging this message.
- **Type**: SNO: Should Not Occur
- **Severity**: error
- **Cause**: -
- **Action**: -
- **Attributes**: error-message
- **Facility**: LOG_DAEMON

## Found this message in the following releases:
- [Junos OS 24.2R1](https://apps.juniper.net/syslog-explorer/?msg=SMTPD_PID_FILE_UPDATE&sw=Junos%20OS&rel=24.2R1)
- [Junos OS 23.4R1](https://apps.juniper.net/syslog-explorer/?msg=SMTPD_PID_FILE_UPDATE&sw=Junos%20OS&rel=23.4R1)